cn.hutool.core.collection

Class AvgPartition<T>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractList<List<T>>

cn.hutool.core.collection.Partition<T>

cn.hutool.core.collection.AvgPartition<T>

Type Parameters:

T - 元素类型

All Implemented Interfaces:

Iterable<List<T>>, Collection<List<T>>, List<List<T>>

Direct Known Subclasses:

RandomAccessAvgPartition

public class AvgPartition<T>
extends Partition<T>

列表分区或分段
通过传入分区个数，将指定列表分区为不同的块，每块区域的长度均匀分布（个数差不超过1）

     [1,2,3,4] -》 [1,2], [3, 4]
     [1,2,3,4] -》 [1,2], [3], [4]
     [1,2,3,4] -》 [1], [2], [3], [4]
     [1,2,3,4] -》 [1], [2], [3], [4], []
 

分区是在原List的基础上进行的，返回的分区是不可变的抽象列表，原列表元素变更，分区中元素也会变更。

Since:

5.7.10

Author:

looly

Field Summary

Fields inherited from class cn.hutool.core.collection.Partition

list, size

Fields inherited from class java.util.AbstractList

modCount

Constructor Summary

Constructors

Constructor and Description
AvgPartition(List<T> list, int limit) 列表分区

Method Summary

Modifier and Type	Method and Description
List<T>	get(int index)
int	size()

Methods inherited from class cn.hutool.core.collection.Partition

isEmpty

Methods inherited from class java.util.AbstractList

add, add, addAll, clear, equals, hashCode, indexOf, iterator, lastIndexOf, listIterator, listIterator, remove, removeRange, set, subList

Methods inherited from class java.util.AbstractCollection

addAll, contains, containsAll, remove, removeAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.List

addAll, contains, containsAll, remove, removeAll, replaceAll, retainAll, sort, spliterator, toArray, toArray

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

AvgPartition

public AvgPartition(List<T> list,
                    int limit)

列表分区

Parameters:

list - 被分区的列表

limit - 分区个数

Method Detail

get

public List<T> get(int index)

Specified by:

get in interface List<List<T>>

Overrides:

get in class Partition<T>

size

public int size()

Specified by:

size in interface Collection<List<T>>

Specified by:

size in interface List<List<T>>

Overrides:

size in class Partition<T>